H3C Technologies H3C SecPath F1000-E - Manual (Page 172)

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To do… Use the command… Remarks
Enter tunnel interface view interface tunnel number —
Configure an IPv4 address for
the tunnel interface ip address ip-address { mask |
mask-length } [ sub ]
Required
By default, no IPv4 address is
configured for the tunnel interface.
Specify the IPv4 over IPv4
tunnel mode
tunnel-protocol ipv4-ipv4
Optional
The default tunnel mode is GRE over
IPv4.
The same tunnel mode should be
configured at both ends of the tunnel.
Otherwise, packet delivery will fail.
Configure a source address
or interface for the tunnel
interface
source { ip-address |
interface-type interface-number }
Required
By default, no source address or
interface is configured for the tunnel.
Configure a destination
address for the tunnel
interface
destination ip-address
Required
By default, no destination address is
configured for the tunnel.
NOTE:
•
To encapsulate and forward IPv4 packets whose destination address does not belong to the subnet
where the receiving tunnel interface resides, you need to configure a static route or dynamic routing for
forwarding those packets through this tunnel interface. If you configure a static route to that destination
IPv4 address, specify this tunnel interface as the outbound interface, or the peer tunnel interface address
as the next hop. A similar configuration needs to be performed at the other tunnel end. If you configure
dynamic routing at both ends, enable the dynamic routing protocol on both tunnel interfaces. For the
detailed configuration, see Static Routing Configuration or other routing protocol configurations in the IP
Routing Volume.
• The IPv4 address of the local tunnel interface cannot be on the same subnet as the destination address
of the tunnel.
• The destination address of a route with a tunnel interface as the egress interface must not be on the same
subnet as the destination address of the tunnel.
• Two or more tunnel interfaces using the same encapsulation protocol must have different source and
destination addresses.
• If you specify a source interface instead of a source address for the tunnel, the source address of the
tunnel is the primary IP address of the source interface.
Configuration Example
Network requirements
As shown in Figure 12 , the two subnets Group 1 and Group 2 running IPv4 are interconnected via an
IPv4 over IPv4 tunnel between Device A and Device B.